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该文以全氟烷基乙基醇(PFEA)为原料,设计合成了3种不同含氟链段长度的可聚合阳离子含氟表面活性剂——N-(乙酸全氟烷基乙基酯)-N-(乙醇丙烯酸酯)二甲基溴化铵(PFDM),通过核磁共振氢谱(1HNMR)对其结构进行了表征。利用Zeta电位测定、表面张力测定等手段考察了不同含氟链段长度对PFDM表面活性的影响,并证明了PFDM的可聚合性。结果表明,随含氟链段的增长,PFDM在水介质中形成胶束的胶束聚集数逐渐增大,CMC呈指数下降,表面活性逐渐增强,且具有良好的可聚合性。
In this paper, perfluoroalkylethyl alcohol (PFEA) was used as a raw material to synthesize three kinds of polymerizable cationic fluorosurfactants, N- (perfluoroalkylethyl acetate) N- (ethanol acrylate) dimethyl ammonium bromide (PFDM), its structure was characterized by 1H nuclear magnetic resonance spectroscopy (1HNMR). Zeta potential measurement, surface tension measurement and other means to examine the different fluorine-containing segment length on the PFDM surface activity, and proved PFDM polymerizability. The results showed that with the increase of fluorine-containing segments, the number of micelles formed by PFDM in aqueous medium increased gradually, the CMC decreased exponentially, the surface activity increased gradually, and the copolymer had good polymerizability.